31. Within days they noticed that it was causing fluorescent tubes to light up across the room. 32. What the staff calls its Christmas tree is actually a Dan Flavin-like chandelier of red fluorescent tubes . 33. :: As the fluorescent tube or LED illumination thing ages, the color of it may go off. 34. The pans holding the fluorescent tubes expanded the sculptural possibilities, framing space, reflecting and amplifying the lights. 35. :: A fluorescent tube would certainly glow if near a sphere energized with high voltage alternating current. 36. As fluorescent tubes age they grow progressively dimmer, and they can be expensive or difficult to replace. 37. The next major technological innovation in neon lighting and signs was the development of fluorescent tube coatings. 38. A fluorescent tube differs from an incandescent bulb in structure and in the way it produces light. 39. These are used with compact fluorescent tubes that plug into a light fixture that has a permanent ballast. 40. A fluorescent tube , mounted on a beam overhead and shaded by a pink curtain, cast a soft light.
